What is Sigma-ring?

A warm core ring is a type of mesoscale eddy which forms and breaks off from an ocean current, such as the Gulf Stream or the Kuroshio Current. The ring...

Penang Outer Ring Road is a planned expressway in George Town, Penang, Malaysia. If constructed, it will connect Gelugor in the south, near Penang Bridge to Tanjung Bungah in the...

The Ludwig Prandtl Ring is the highest award of the Deutsche Gesellschaft für Luft- und Raumfahrt , awarded "for outstanding contribution in the field of aerospace engineering". The award is...

In the geometry of circle packings in the Euclidean plane, the ring lemma gives a lower bound on the sizes of adjacent circles in a circle packing.

There are several ring roads in Singapore which aid relieving congestion on arterial road running through a town or area. These rings roads are usually served by a feeder bus...

The Jodhpur Ring Road is a road project aimed at connecting the highways surrounding the cities of Jaipur, Nagaur, Jaisalmer, Barmer and Pali in the state of Rajasthan, India.

In ring theory, a branch of abstract algebra, an idempotent element or simply idempotent of a ring is an element a such that a = a. That is, the element...

In mathematics, a non-empty collection of sets R...

In stable homotopy theory, a ring spectrum is a spectrum E together with a multiplication map and a unit map where S is the sphere spectrum. These maps have to...

In mathematics, specifically abstract algebra, an Artinian ring is a ring that satisfies the descending chain condition on ideals; that is, there is no infinite descending sequence of ideals. Artinian...